Question

Приехал 90 туристов. 52 из них знают казахский, а 49 знают русский язык. 20 туристов не знают ни русского ни казахского. Сколько туристов знают и русский и казахский? Помогите пожалуйста! Дам 20 баллов

Answer 1

Ответ:

1)90-20=70

2)52-49=3

3)70+3=73

Ответ: 73 человека знают казахский и русский

Answer 2

Analysis of Tourists' Language Knowledge

To solve this problem, we can use the principle of inclusion-exclusion. Let's denote the number of tourists who know Kazakh as A, the number of tourists who know Russian as B, and the number of tourists who know both languages as C. We are given the following information: - A = 52 - B = 49 - A ∪ B = 90 - A' ∩ B' = 20

Calculation of Tourists Knowing Both Languages

Using the principle of inclusion-exclusion, we can calculate the number of tourists who know both languages (C): - A ∪ B = A + B - A ∩ B - 90 = 52 + 49 - C - C = 52 + 49 - 90 - C = 11

Therefore, 11 tourists know both Russian and Kazakh languages.

I hope this helps! If you have any other questions, feel free to ask.